Controlling the mapping of original functions to the associated IEEE variants

You can use the _IEEE_SOURCE preprocessor define to specify whether the original library functions (/390 functions) for floating-point arithmetic are mapped to the associated IEEE variants. The prototypes of the IEEE functions are always generated.

_IEEE_SOURCE can take on the following values:

_IEEE_SOURCE == 0

The /390 functions are not mapped to the corresponding IEEE variants. /390 and IEEE functions can thus be used in parallel. This setting applies regardless of the settings of the compiler (see the _IEEE define on "Generating IEEE floating-point numbers by means of a compiler option").

_IEEE_SOURCE == 1

The /390 functions are mapped to the corresponding IEEE variants. It is thus not possible to use /390 and IEEE functions in parallel. This setting applies regardless of the settings of the compiler (see the _IEEE define on "Generating IEEE floating-point numbers by means of a compiler option").

The _MAP_NAME preprocessor define allows you to specify whether the /390 functions are to be mapped to the IEEE functions by means of the name define method or the macro define method.

If you want to control the mapping of the original functions to the associated IEEE functions by means of the preprocessor define, you have to use the function declarations of the standard include files (i.e. you have to include the standard include files).

_IEEE_SOURCE is not defined

In this case, the following takes place, depending on the compiler option (see the _IEEE define on "Generating IEEE floating-point numbers by means of a compiler option"):

_IEEE == 0 or _IEEE not defined

The /390 functions are not mapped to the corresponding IEEE variants.

_IEEE == 1

The /390 functions are mapped to the corresponding IEEE variants.

To control the mapping of the original functions to the associated IEEE variants, you have to specify the MODIFY-MODULE-PROPERTIES compiler option as follows:

MODIFY-MODULE-PROPERTIES          -
...
LOWER-CASE-NAMES=*YES,            -
SPECIAL-CHARACTERS=*KEEP,         -
...

This prevents:

• the names of the IEEE functions (see "C library functions that support IEEE floating-point numbers") from being truncated to eight characters

• lowercase letters from being converted to uppercase and the character “_” from being replaced with “$” in the function names

In POSIX, you specify the following to achieve this:

-K llm_keep

-K llm_case_lower